Subaru Legacy 2003 Service Manual page 587

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
AM:DTC P0400 — EXHAUST GAS RECIRCULATION FLOW —
• DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• TROUBLE SYMPTOM:
• Poor driving performance on low engine speed
• Erroneous idling
• Poor driving performance.
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode<Ref. to EN(H4SO)-47, OPER-
ATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO)-40, OPERATION, Inspection
Mode.> .
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
B47
E18
1 2
B328
3 4
5 6
1 2 3
4 5 6
LHD
B22
E3
EGR
SOLENOID
VALVE
E18
B134 ECM
F44 B22
1 2 3 4 1 2 3 4
5 6 7 8 5 6 7 8
9 10 11 12
13 14 15 16
EN(H4SO)-190
SBF-5
LHD
6
B61 F44
E58
B328
B134
1 2 3 4 5 6
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33
BATTERY
7 8
34 35
EN-01129